二从动轮式复合齿轮泵的流量特性

The Flow Characteristics of a Compound Gear Pump With 2-Idlers

讨论了二从动轮式复合齿轮泵的结构原理,导出了排量、平均流量、瞬时流量和流量脉动率的计算公式。分析了其流量脉动情况,并得出:在齿数相同时,该泵的排量、平均流量和瞬时流量均比普通齿轮泵增加了一倍,从而提高了泵的功率密度,当取齿数Z=2k+1时,该种泵具有流量脉动频率高,流量脉动率小的流量特性,使齿轮泵能够用于对流量品质要求高的场合。

This paper analyzes the flow pulsation in a compound gear pump with 2-idlers,derives formulae for calculating displacement, average flow velocity, instantaneous flow and pulsation flow. It is pointed out that this sort of gear pump can provide higher flow pulsation frequency when taking teeth number z=2k+1.